如何使用在设计时接受其他控件的子面板创建自定义控件？

class CustomPanel(Panel):
    def __init__(self, parent):
        super().__init__(parent)
        self.contentPanel = Panel(self)

    def DoLayout(self):
        self.contentPanel.SetSize(self.GetSize())
        self.contentPanel.SetPosition((0, 0))

    def OnPaint(self, event):
        dc = wx.PaintDC(self)
        dc.SetBrush(wx.Brush(self.GetBackgroundColour()))
        dc.DrawRectangle(self.GetClientRect())
        self.contentPanel.Refresh()

    def OnChildEvent(self, event):
        # 处理子面板的事件
        pass